Full-Time

Graduate Software Engineer

Updated on 9/3/2026

Citadel Securities

Citadel Securities

1,001-5,000 employees

Global market maker delivering liquidity

Compensation Overview

$235k - $300k/yr

+ Discretionary incentive compensation

Miami, FL, USA + 1 more

More locations: New York, NY, USA

In Person

Office-based in New York, NY or Miami, FL.

Bachelor's, Master's, PhD

Category
Software Engineering
Required Skills
Data Analysis

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Requirements
  • Bachelor's, master's or PhD in Computer Science, Computer Engineering or related fields
  • Exceptional programming and design skills
  • Strong analytical skills and familiarity with probability and statistics
  • Ability to communicate effectively in a collaborative, complex and highly technical team environment
  • Intellectual curiosity and passion for solving challenging problems using technology
Responsibilities
  • Create technological tools that bring trading strategies to life
  • Develop high-performance, large data research platforms
  • Work in small teams to build the future of finance

Citadel Securities is a global market maker that provides liquidity and trading services to institutional clients in equities, options, and FICC markets. It uses advanced technology and data analytics to place and manage bid-ask quotes, execute trades, and optimize order routing, earning a small margin on each trade and charging fees for services. Its products and services help clients meet liquidity needs with low-cost, efficient execution. The company distinguishes itself by aiming for the fairest, most transparent, and open markets, continually reinvesting in technology and expertise to improve market efficiency and transparency. The goal is to bridge the financial markets with the real economy by creating reliable liquidity and transparent trading environments.

Company Size

1,001-5,000

Company Stage

Growth Equity (Venture Capital)

Total Funding

$1.2B

Headquarters

Miami, Florida

Founded

2002

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Simplify Jobs

Simplify's Take

What believers are saying

  • Second-quarter 2026 trading revenue hit $7.3 billion, with $3.3 billion net income.
  • H1 2026 produced $11.6 billion revenue, nearly matching full-year 2025 totals.
  • ATLAS and Amsterdam expansion position Citadel Securities for institutional and crypto market-structure growth.

What critics are saying

  • Citadel Securities faces a D.C. lawsuit over $119 million in disputed CAT fees.
  • Grant & Eisenhofer sued Citadel Securities on June 29, 2026, over Genius spoofing allegations.
  • A regulatory crackdown on order-flow practices would damage retail access and threaten its core franchise.

What makes Citadel Securities unique

  • Citadel Securities processes over one-third of U.S. retail stock trades.
  • Its July 2026 Amsterdam hub deepens European equity-options and quantitative research coverage.
  • The firm is building institutional block-trading and ATLAS infrastructure beyond retail flow.

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Benefits

Health Insurance

Life Insurance

401(k) Retirement Plan

Performance Bonus

Growth & Insights and Company News

Headcount

6 month growth

-1%

1 year growth

-2%

2 year growth

-2%
Disruption Banking
Aug 29th, 2026
Citadel Securities made $3.3B in three months. How much of that profit will its employees pocket?

Citadel Securities made $3.3B in three months. How much of that profit will its employees pocket? People at Citadel Securities have a new number to contemplate before bonus season: $3.3 billion. That was the market maker's net income in the second quarter of 2026, up more than 250 percent from a year earlier. Trading revenue more than tripled to a record $7.3 billion, Bloomberg reported, citing someone familiar with the private results. Citadel Securities declined to comment. Revenue does not pass directly into employees' pockets. Still, 2026 has already supplied ample material for some ambitious bonus expectations. Six months, $5.2B of profit. Citadel Securities generated approximately $4.3 billion of revenue and $1.9 billion of net income in the first quarter, according to figures Bloomberg published in May. Add the two quarters together, and the firm has produced $11.6 billion of revenue and $5.2 billion of net income in six months (H1 2026). For comparison, Citadel Securities generated $12.2 billion of revenue and $5.4 billion of net income during the whole of 2025, according to The New Yorker. It has therefore come close to matching last year's totals in half the time. Retail traders returned at the right time. Record US equity and options volumes supplied the opportunity. Retail participation remained elevated through May and June, and Citadel Securities handles more than one-third of US retail stock trades. The firm is particularly well placed when more orders pass through the market, and prices move sharply. This quarter provided plenty of both. Jane Street and Hudson River Trading have also reported unusually large revenues this year, suggesting the benefits were not confined to Citadel Securities. However, Citadel Securities is no longer relying solely on electronic retail flow. It has also been building a high-touch equities business to compete for the larger institutional trades traditionally handled by banks. President Jim Esposito said on 17 August that the new operation had "executed hundreds of block trades over the past few months," while adding that the firm had also expanded its "relationships with clients, including some of the world's leading venture capital and private equity firms." Citadel Securities has not disclosed how much revenue the desk generated. Its inclusion in Esposito's client letter nevertheless suggests that the firm considers the early results worth advertising. Good results do not mean indiscriminate hiring. Candidates should not mistake a record quarter for a universally open door. Electronic market makers are built to increase trading volumes without expanding headcount at the same rate. More revenue can produce larger rewards for existing teams just as readily as it creates new jobs. Where Citadel Securities does hire, the clearest business case is likely to involve quantitative research, engineering, risk management or high-touch traders and salespeople with valuable client relationships. A generalist flow trader without an additional technical or commercial advantage is less obviously required. Banks continue to generate respectable trading revenues of their own. However, the growth of Citadel Securities, Jane Street and Hudson River Trading shows how much activity is now concentrated among firms combining technology, capital and direct access to order flow. That concentration is good for people already working at the winners. It is less helpful to everyone hoping that record industry revenues will produce a broad hiring boom. The other Citadel has been busy too. Citadel Securities is separate from Citadel, Ken Griffin's hedge fund. The latter has nevertheless demonstrated its own capacity to move large positions this summer. As Disruption Banking reported here, Citadel acquired a material portion of Situational Awareness' public-equity portfolio in late July. Griffin subsequently told investors that the firm completed nearly 100 block trades worth more than $4 billion while reducing the associated risk. None of that activity forms part of Citadel Securities' $7.3 billion revenue figure. It does show how both Griffin businesses can deploy technology, capital and market relationships when an unusually large opportunity appears. The bonus pool question: how much of Citadel Securities' $3.3B profit will its employees pocket? Retail flows can reverse quickly. High-touch relationships should provide a less volatile source of business, although they take longer to establish and require different people. Citadel Securities does not publish its compensation pool, so outsiders cannot know how much of this year's profit will reach employees. There is little doubt that the firm has generated enough money to pay well. The more interesting questions are how much it will distribute and who will receive the largest share. The traders, quants, engineers and salespeople most directly responsible for the firm's growth will presumably have the strongest arguments. Anyone hoping that the record quarter will make Citadel Securities less selective may be disappointed. The editorial team at #DisruptionBanking has taken all precautions to ensure that no persons or organisations have been adversely affected or offered any sort of financial advice in this article. This article is most definitely not financial advice.

PR Newswire
Aug 27th, 2026
INVESTOR ALERT: Pomerantz law Firm reminds investors with losses on their investment in Genius group limited of class action lawsuit and upcoming deadlines - GNS.

INVESTOR ALERT: Pomerantz law Firm reminds investors with losses on their investment in Genius group limited of class action lawsuit and upcoming deadlines - GNS. Aug 27, 2026, 16:04 ET NEW YORK, Aug. 27, 2026 /PRNewswire/ - Pomerantz LLP announces that a class action lawsuit has been filed on behalf of investors in Genius securities, alleging violations of the federal securities laws by Citadel Securities LLC ("Citadel") and Virtu Americas LLC ("Virtu" and, together with Citadel, the "Defendants"). Such investors are advised to contact Danielle Peyton at [email protected] or 646-581-9980, (or 888.4-POMLAW), toll-free, Ext. 7980. Those who inquire by e-mail are encouraged to include their mailing address, telephone number, and the number of shares purchased. The class action concerns whether the Defendants and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices. You have until August 28, 2026, to ask the Court to appoint you as Lead Plaintiff for the class if you purchased or otherwise acquired Genius securities during the Class Period. A copy of the Complaint can be obtained at www.pomerantzlaw.com. The complaint alleges that throughout the Class Period, Defendants engaged in a manipulative and illegal trading practice known as "spoofing," which involves submitting and then cancelling buy or sell orders without any genuine intent to execute them. The purpose of these "baiting orders" was to mislead other market participants about the true level of supply and demand for Genius securities, or about the stock's price volatility, thereby influencing the market price of Genius to benefit Defendants' own trading positions. The alleged manipulation also increased investors' transaction costs by inflating the bid-ask spread for Genius stock. Defendants entered thousands of these baiting orders on U.S. stock exchanges to create the false impression that Genius's stock price reflected genuine supply-and-demand and volatility dynamics, while simultaneously profiting by absorbing and reselling their customers' order flow at prices favorable to Defendants. The complaint further alleges that throughout the Class Period, sharp declines in Genius's stock price consistently coincided with substantial spikes in Defendants' spoofing activity. For example, during the week of February 10, 2025, Defendants built significant short positions in Genius stock and reaped substantial trading profits: Citadel traded more than 23 million shares of Genius off-exchange, accounting for nearly half of all off-exchange trading in the stock, while Virtu traded nearly 11 million shares, accounting for more than 20% of all off-exchange trading. Together, Defendants comprised nearly 70% of all off-exchange trading in Genius stock that week, as short volume surged from a low of 53% to more than 61%. As a result, Genius's stock price decline by 22% despite the absence of any new material, company-specific news. Pomerantz LLP, with offices in New York, Chicago, Los Angeles, London, Paris, and Tel Aviv, is acknowledged as one of the premier firms in the areas of corporate, securities, and antitrust class litigation. Founded by the late Abraham L. Pomerantz, known as the dean of the class action bar, Pomerantz pioneered the field of securities class actions. Today, more than 85 years later, Pomerantz continues in the tradition he established, fighting for the rights of the victims of securities fraud, breaches of fiduciary duty, and corporate misconduct. The Firm has recovered numerous multimillion-dollar damages awards on behalf of class members. See www.pomlaw.com. Attorney advertising. Prior results do not guarantee similar outcomes. SOURCE Pomerantz LLP

Gate.com
Aug 27th, 2026
Citadel Securities' Q2 trading revenue hits record $7.3 billion.

Citadel Securities' Q2 trading revenue hits record $7.3 billion. 2026-08-27 13:55:02 According to Bloomberg, Citadel Securities' second-quarter trading revenue hit a record $7.3 billion, more than doubling compared to the same period last year. The firm's net profit surged to $3.3 billion, up over 250% year-over-year, driven by growth in its high-touch equities business. Disclaimer: The information on this page may come from third-party sources and is for reference only. It does not represent the views or opinions of Gate and does not constitute any financial, investment, or legal advice. Virtual asset trading involves high risk. Please do not rely solely on the information on this page when making decisions. For details, see the Disclaimer. In-Depth Analysis

Dropstab
Aug 25th, 2026
LayerZero (ZRO), together with Citadel Securities and DTCC, will launch the institutional crypto exchange ATLAS this fall.

LayerZero (ZRO), together with Citadel Securities and DTCC, will launch the institutional crypto exchange ATLAS this fall. 25 Aug, 2026 byDropsTab Join Its Socials ATLAS will not have a consumer application; it will become the underlying infrastructure for trading assets on the blockchain for institutional clients. Coinbase has launched tokenized stocks on Base. Trading is available 24/7, and liquidity has already appeared on Aerodrome (AERO). 25 Aug, 2026 byDropsTab Join Its Socials Coinbase has launched tokenized shares of U.S. companies on the Base network. These shares are issued under the B20 standard and are backed by real shares held in a 1:1 ratio by the regulated broker and custodian Alpaca. Users outside the U.S. in supported jurisdictions will be able to hold and trade fractional shares of stocks, including Apple and NVIDIA, directly through non-custodial wallets. Trading is available 24/7, and liquidity has already appeared on Aerodrome. The tokenized shares can also be used in Base's DeFi protocols - for example, as collateral for loans via Aave or to provide liquidity on DEXs. B20 is based on ERC-20 and is compatible with existing wallets and DeFi infrastructure. Dividends and stock splits are accounted for via a special on-chain mechanism without changing the number of tokens on the balance. Base announced that in the coming weeks, Coinbase's list of available tokenized shares will be expanded, and later, other RWA assets are planned to be added to the network. Arthur hayes' new essay, "same same but different": Bessent repeats Yellen's pattern - Bitcoin responds with a rise. 25 Aug, 2026 byDropsTab Join Its Socials The actions of the U.S. Treasury Department, led by Scott Bessent, are starting to resemble Janet Yellen's policy from late 2023, when an increase in short-term government bond issuance helped release about $2.4 trillion in liquidity. It was precisely this factor that supported the growth of Nasdaq and Bitcoin at the time. Now, Bessent is trying to curb the rise in long-term Treasury yields by increasing the volume of reverse repurchase agreements. On August 19, the Treasury announced additional buybacks totaling approximately $20 billion, after which the yield on 10-year bonds briefly declined, and Bitcoin saw a noticeable rally. However, this volume is insufficient, and the market may force the Treasury to expand its support. Three possible scenarios: * The Treasury and the White House cut spending - unlikely ahead of the election; * Bessent announces unlimited bond buybacks at yields above 5% (following the model of the Bank of Japan) - the best-case scenario for Bitcoin; * The most likely scenario is a gradual increase in buybacks combined with the use of other reserves, including the Treasury's account at the Federal Reserve (TGA, around $1 trillion). A direct interest rate cut or a new round of quantitative easing is unlikely until the AI infrastructure market bubble bursts. Maelstrom's position: The company holds maximum risk in its portfolio - betting on Bitcoin, Ether, Ethena, and Ether.fi. Mining Zcash (ZEC) is currently 4.5 times more profitable than mining Bitcoin (BTC). 24 Aug, 2026 byDropsTab Join Its Socials Against the backdrop of ZEC's growth, the profitability of Zcash mining has noticeably increased. Currently, the Antminer Z15 Pro generates about $727 in gross revenue per 1 MWh of electricity: * Zcash - $727 per 1 MWh. * AI/HPC computing - $223. * Bitcoin on the Antminer S23 Pro - $162. * Bitcoin on the Antminer S21 Pro - $103. In terms of gross revenue per unit of electricity, Zcash mining is now approximately 3.3 times more profitable than AI/HPC and 4.5 times more profitable than Bitcoin mining on the new-generation ASICs. As recently as late June, the Z15 Pro generated around $373 per 1 MWh. The main driver behind this increase was the rise in ZEC prices by roughly 70% over the past week. It's important to note that this refers specifically to gross revenue, excluding costs for equipment, maintenance, and electricity consumption. The Entropy platform for trading pre-IPO assets on Hyperliquid has raised $14 million and $40 million in HYPE. 24 Aug, 2026 byDropsTab Join Its Socials The Entropy project has announced the raising of $14 million in funding led by Ribbit Capital, as well as $40 million in HYPE, which will be staked to develop trading markets on Hyperliquid. Entropy's first product will be a marketplace for trading Anthropic - the team calls it the first liquid way to gain exposure to the company before its IPO. Entropy is developing infrastructure for trading assets that are difficult to bring onto conventional markets: pre-IPO companies, startups, commodities, indices, and other instruments. To this end, the project is building its own liquidity-weighted oracle that will take into account the real depth of the market and enable price discovery directly through the order book. The team consists of former employees and traders from Citadel Securities, Optiver, Polymarket, and Millennium. The project's first markets are already being launched on Hyperliquid. BTC at the moment > 81,000. 24 Aug, 2026 byDropsTab Join Its Socials Join Stake 200% Bonus. Win $100k Daily. Play with Crypto, Enjoy Best VIP Club, Daily Bonuses, Instant Withdrawals.

Global Trading
Aug 11th, 2026
UBS trader switches to Citadel Securities.

UBS trader switches to Citadel Securities. August 11, 2026 9:17 am Zeyad Elnaqa has joined Citadel Securities as a client execution trader in Dublin. Citadel Securities reports that it trades close to a quarter of daily volumes in US equities. According [...] This content is for registered users only. (C) Markets Media Europe 2026